CN202856960U - Audio and video power amplifier output system - Google Patents
Audio and video power amplifier output system Download PDFInfo
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- CN202856960U CN202856960U CN 201220491774 CN201220491774U CN202856960U CN 202856960 U CN202856960 U CN 202856960U CN 201220491774 CN201220491774 CN 201220491774 CN 201220491774 U CN201220491774 U CN 201220491774U CN 202856960 U CN202856960 U CN 202856960U
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Abstract
The utility model discloses an audio and video power amplifier output system which comprises an audio processor which is connected with a plurality of sound reproduction output channels of a cinema and speaker units which are respectively used for treble output, alto output and bass output in each sound channel. A speaker unit of each sound channel and the audio processor are connected through an asymmetric output power amplifier which comprises a power supply driving unit and sound channel amplifying units corresponding to treble, tenor, and bass of each sound channel respectively. Each sound channel amplifying unit is driven by the power supply driving unit to process a corresponding audio signal, and the processed audio signal is outputted to the corresponding speaker unit. The corresponding output power requirements are realized by the sound channel amplifying units corresponding to the treble, tenor, and bass of each sound channel respectively according to needs through a hardware circuit so as to adapt to a condition that cinema multichannel audio output power requirements are different, thus the distribution of power resource is reasonable, and the working efficiency of the system is improved.
Description
Technical field
The utility model relates to playback export technique field, and particularly a kind of being applied to provides the audio-visual power amplifier output system of equipment guarantee in the digital movie broadcast for the playback of movie theatre multichannel.
Background technology
Present film sounding system mainly for the left, center, right of film, left around, right around, the inferior bass signal of totally six sound channels, with a series of processing of above-mentioned signal through audio process, by in addition power amplification of power amplifier, drive at last the sound that each channel loudspeaker comes replay movies to record again.Also in the configuration of system for electrical teaching, the power amplifier that usually adopts is the dual track output type of power symmetry at movie theatre.But drive the required watt level of each sound channel and unequal, therefore the sound effect debugging level for the field engineering technical staff requires very high.And along with the fast development of digital movie, film audio record with reduction technique on the trend of oriented multichannel development.At present can in movie theatre, place the audio amplifier of 16 sound channels at most, so that the reduction of sound is finer and smoother and well arranged.If the sound-reducing of multichannel continue to use traditional sound reproducing equipment, will debugging work load be multiplied and can not guarantee the optimum Match of movie theatre sound field.
Summary of the invention
The purpose of this utility model is, defective for prior art provides a kind of audio-visual power amplifier output system, it can adapt to each sound channel in the movie theatre, and each sound channel in different loudspeaker units to the driving power size requirements neither with situation, so that the distribution of power resource is more rational, system works efficient is improved.
For achieving the above object, the technical scheme that the utility model is taked is: a kind of audio-visual power amplifier output system, comprise the audio process that connects a plurality of playback output channels of movie theatre, and the loudspeaker unit that is respectively applied to each sound channel alt, middle pitch, bass output; Be connected by asymmetric output power amplifier between the loudspeaker unit of each sound channel and the audio process, the channel audio signal of asymmetric output power amplifier audio reception processor output, and the audio signal of corresponding sound channel processed, the audio signal after will processing again exports corresponding loudspeaker unit to;
Above-mentioned each asymmetric output power amplifier comprises the sound channel amplifying unit of power drives unit and respectively corresponding each sound channel high pitch, middle pitch, bass; Each sound channel amplifying unit is processed corresponding audio signal under the driving of power drives unit; The power output of the sound channel amplifying unit of corresponding each sound channel high pitch, middle pitch, bass increases successively respectively.
Because movie theatre with each sound channel power output size of power amplifier, is according to the also output of prime equipment and the input of rear class equipment in the system for electrical teaching of movie theatre, and debugs the factor such as optimization and determine, be different from the normal domestic use power amplifier; So the utility model is when using, the power output of each sound channel amplifying unit of asymmetric output power amplifier size needs to export accordingly requirement according to sound channel and arranges, and utilizes the available circuit technology to realize by the related circuit structure.Namely require output three road power of the sound channel amplifying unit of the basic, normal, high triple-track of corresponding each sound channel to be respectively such as design specifications: A road 850W, B road 600W, C road 200W is 8 ohm load, then:
At first according to the requirement of design specifications, calculate three tunnel supply voltage numerical value that apply respectively according to the power output that three sound channel amplifying units should reach, power output such as power amplifier C road is 200W, 8 ohm of loads, conversion efficiency is 75%, the advance signal end should apply the direct voltage of 53V, the power drives unit adopts bridge rectifier, then the secondary voltage of transformer is 44V, the common value 10% of loss, in order to leave surplus, actual value is than the high 3-5V of calculated value, then voltage value in C road is 53V, and other two-way calculation Design methods are similar.Because demanded power output is different, so amplifying circuit also can there are differences in each unit, electro-acoustic conversion efficiency is different.This moment, the conversion of A road and B road adoptable H class secondary power supply made efficient about 90%; Power little its conversion efficiency in C road is about 75%.
As a kind of improvement, the utility model also comprises display unit, is provided with the state display lamp that connects each sound channel amplifying unit in the display unit.Status indicator lamp can arrange a plurality of; such as power supply indicator, signal lamp, slicing indicator light, temperature indicator and direct current protecting indicator light etc.; each indicator light is driven by the modular circuit of each corresponding function respectively and lights, thereby the operating state that can in time obtain the sound channel amplifying unit for the staff is provided convenience.
The beneficial effects of the utility model are: movie theatre also respectively comprises height in the system for electrical teaching, in, the respectively corresponding asymmetric power amplifier of the sound channel of low loudspeaker unit, carried out the amplification of sound processes and final output by each the sound channel amplifying unit in the asymmetric power amplifier, combination is convenient, and can adapt to each sound channel in the movie theatre, and each sound channel in different loudspeaker units to the driving power size requirements neither with situation, also can avoid the wasting of resources of high power amplifier promotion small-power audio amplifier in traditional power amplifier, so that the distribution of power resource is comparatively reasonable, the reduction of sound is finer and smoother and well arranged, and system works efficient also is improved.And field engineering of the present utility model is less demanding to technical staff's sound effect debugging level, can guarantee the optimum Match of movie theatre sound field.
Description of drawings
Figure 1 shows that system configuration schematic diagram of the present utility model;
Figure 2 shows that the electrical block diagram of asymmetric power amplifier in the utility model.
Embodiment
For content of the present utility model is become apparent more, be described further below in conjunction with the drawings and specific embodiments.
As shown in Figure 1, audio-visual power amplifier output system of the present utility model comprises the audio process that connects a plurality of playback output channels of movie theatre, and the loudspeaker unit that is respectively applied to each sound channel alt, middle pitch, bass output; Be connected by asymmetric output power amplifier between the loudspeaker unit of each sound channel and the audio process, the channel audio signal of asymmetric output power amplifier audio reception processor output, and the audio signal of corresponding sound channel processed, the audio signal after will processing again exports corresponding loudspeaker unit to;
Above-mentioned each asymmetric output power amplifier as shown in Figure 2, it comprises power drives unit and the sound channel amplifying unit of corresponding each sound channel bass, middle pitch, high pitch respectively, A as shown in Figure 2, B, C road sound channel amplifying unit; Each sound channel amplifying unit is processed corresponding audio signal under the driving of power drives unit; The power output of the sound channel amplifying unit of corresponding each sound channel high pitch, middle pitch, bass increases successively respectively.
In high-grade digital camera projection system, at present maximum configurable 16 sound channel sound source.Respectively corresponding: left (L), in (C), right (R), left (LC), right (RC), inferior low (SW), left around (LS), right around (RS), left back around BLS), right back around (BRS), left front top (LFT), right front top (RFT), left back top (LBT), right back top (RBT), left rear corner (LBB), right back angle (RBB) totally 16 sound channels.In each sound channel, audio amplifier all has high pitch, middle pitch, three loudspeaker units of bass or has at least high pitch and two loudspeaker units of bass simultaneously.According to the needs of sound field design, these 16 corresponding power drive of audio amplifier are different, also are different to the power drive requirement of three different loudspeaker units in the audio amplifier simultaneously.
Because movie theatre with each sound channel power output size of power amplifier, is according to the also output of prime equipment and the input of rear class equipment in the system for electrical teaching of movie theatre, and debugs the factor such as optimization and determine, be different from the normal domestic use power amplifier; So the utility model is when using, the power output of each sound channel amplifying unit of asymmetric output power amplifier size needs to export accordingly requirement according to sound channel and arranges, and utilizes the available circuit technology to realize by the related circuit structure.Namely require output three road power of the sound channel amplifying unit of the basic, normal, high triple-track of corresponding each sound channel to be respectively such as design specifications: A road 850W, B road 600W, C road 200W is 8 ohm load, then:
At first according to the requirement of design specifications, calculate three tunnel supply voltage numerical value that apply respectively according to the power output that three sound channel amplifying units should reach, power output such as power amplifier C road is 200W, 8 ohm of loads, conversion efficiency is 75%, the advance signal end should apply the direct voltage of 53V, the power drives unit adopts bridge rectifier, then the secondary voltage of transformer is 44V, the common value 10% of loss, in order to leave surplus, actual value is than the high 3-5V of calculated value, then voltage value in C road is 53V, and other two-way calculation Design methods are similar.Because demanded power output is different, so amplifying circuit also can there are differences in each unit, electro-acoustic conversion efficiency is different.This moment, the conversion of A road and B road adoptable H class secondary power supply made efficient about 90%; Power little its conversion efficiency in C road is about 75%.
Be provided with the state display lamp that connects each sound channel amplifying unit in the display unit shown in Fig. 2.Status indicator lamp can arrange a plurality of; such as power supply indicator, signal lamp, slicing indicator light, temperature indicator and direct current protecting indicator light etc.; each indicator light is driven by the modular circuit of each corresponding function respectively and lights, thereby the operating state that can in time obtain the sound channel amplifying unit for the staff is provided convenience.
In addition, the multichannel audio processor in the utility model is prior art, and it can carry out processing and the distribution of channel audio signal in conjunction with existing software engineering.
The case of implementation described in the utility model only is better case study on implementation of the present utility model, is not to limit practical range of the present utility model.Be that all equivalences of doing according to the content of the utility model claim change and modification, all should be as technology category of the present utility model.
Claims (2)
1. an audio-visual power amplifier output system comprises the audio process that connects a plurality of playback output channels of movie theatre, and the loudspeaker unit that is respectively applied to each sound channel alt, middle pitch, bass output; It is characterized in that, be connected by asymmetric output power amplifier between the loudspeaker unit of each sound channel and the audio process, the channel audio signal of asymmetric output power amplifier audio reception processor output, and the audio signal of corresponding sound channel processed, the audio signal after will processing again exports corresponding loudspeaker unit to;
Above-mentioned each asymmetric output power amplifier comprises the sound channel amplifying unit of power drives unit and respectively corresponding each sound channel high pitch, middle pitch, bass; Each sound channel amplifying unit is processed corresponding audio signal under the driving of power drives unit; The power output of the sound channel amplifying unit of corresponding each sound channel high pitch, middle pitch, bass increases successively respectively.
2. audio-visual power amplifier output system according to claim 1 is characterized in that, each asymmetric output power amplifier also comprises display unit, is provided with the state display lamp that connects each sound channel amplifying unit in the display unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220491774 CN202856960U (en) | 2012-09-25 | 2012-09-25 | Audio and video power amplifier output system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220491774 CN202856960U (en) | 2012-09-25 | 2012-09-25 | Audio and video power amplifier output system |
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| CN202856960U true CN202856960U (en) | 2013-04-03 |
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| CN 201220491774 Expired - Fee Related CN202856960U (en) | 2012-09-25 | 2012-09-25 | Audio and video power amplifier output system |
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| CN (1) | CN202856960U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112346694A (en) * | 2019-08-08 | 2021-02-09 | 海信视像科技股份有限公司 | Display device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112346694A (en) * | 2019-08-08 | 2021-02-09 | 海信视像科技股份有限公司 | Display device |
| CN112346694B (en) * | 2019-08-08 | 2023-03-21 | 海信视像科技股份有限公司 | Display device |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130403 Termination date: 20190925 |
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| CF01 | Termination of patent right due to non-payment of annual fee |